# Python if语句嵌套
proof = int(input("输入驾驶员每 100ml 血液酒精的含量："))
if proof < 20:
    print("驾驶员不构成洒驾")
else:
    if proof < 80:
        print("驾驶员已构成洒驾")
    else:
        print("驾驶员已构成醉驾")
